论文标题
Terahertz通信系统的多个变速箱窗口中的新型频谱分配
Novel Spectrum Allocation Among Multiple Transmission Windows for Terahertz Communication Systems
论文作者
论文摘要
本文提出了一种新型的频谱分配策略，该频谱terahertz（THZ）带通信系统是由多个变速箱窗口（TWS）组成的。该策略探讨了（i）允许用户占据不平等带宽的子带的好处，并且（ii）最佳地避免使用在分子吸收损失较高的TWS边缘存在的某些光谱。为了最大化汇总的多源数据速率，我们制定了一个优化问题，主要关注频谱分配。然后，我们应用转换和修改以使问题计算可通过，并基于连续的凸近近似制定迭代算法，以确定TWS边缘的最佳子波带宽和未使用的光谱。使用数值结果，我们表明，与相等的子频段带宽相比，通过更改子带宽可以实现明显更高的数据速率。我们还表明，与避免在TWS边缘处使用预定的光谱相比，可以通过最佳确定TWS边缘的未使用光谱来获得进一步的数据率增长。
This paper presents a novel spectrum allocation strategy for multiuser terahertz (THz) band communication systems when the to-be-allocated spectrum is composed of multiple transmission windows (TWs). This strategy explores the benefits of (i) allowing users to occupy sub-bands with unequal bandwidths and (ii) optimally avoiding using some spectra that exist at the edges of TWs where molecular absorption loss is high. To maximize the aggregated multiuser data rate, we formulate an optimization problem, with the primary focus on spectrum allocation. We then apply transformations and modifications to make the problem computationally tractable, and develop an iterative algorithm based on successive convex approximation to determine the optimal sub-band bandwidth and the unused spectra at the edges of TWs. Using numerical results, we show that a significantly higher data rate can be achieved by changing the sub-band bandwidth, as compared to equal sub-band bandwidth. We also show that a further data rate gain can be obtained by optimally determining the unused spectra at the edges of TWs, as compared to avoiding using pre-defined spectra at the edges of TWs.
